As a Flyer Lindros was above average defensively. Great face-off man, and often dominated with play in the oppositions end (the best defense you can possibly play).
Primeau went from average defensive to a tremendous shutdown center once Hitchcock arrived and put him in that role. If not for a broken ribs that cost him a number of games late in the season, he was a lock for the Selke in 04.
Why was Primeau's run in 04 playoffs so good ??
A dominant shutdown and physical prensence, with the huge bonus of scoring big goals at absolute key times during that run. He was absolutely everything you'd want of a leader and captain that spring. Unfortunately, he likely overdid it, and played at least part of the playoffs while suffering from post concussion syndrome, and he never fully recovered, even after the lockout. Far and away the best performance by a Flyer in the playoffs since at least 87, and an argument can be made since 76.